f63c7e582a
This makes my system use only ~5% CPU on reading 4.5Mbyte/sec from a CDROM, which before was limitted to 1.8Mbyte/sec due to 100% CPU load..
165 lines
6.3 KiB
C
165 lines
6.3 KiB
C
/*-
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* Copyright (c) 1998,1999 Søren Schmidt
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer,
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* without modification, immediately at the beginning of the file.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $Id: ata-all.h,v 1.7 1999/06/25 09:02:57 sos Exp $
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*/
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/* ATA register defines */
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#define ATA_DATA 0x00 /* data register */
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#define ATA_ERROR 0x01 /* (R) error register */
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#define ATA_FEATURE 0x01 /* (W) feature register */
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#define ATA_F_DMA 0x01 /* enable DMA */
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#define ATA_F_OVL 0x02 /* enable overlap */
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#define ATA_COUNT 0x02 /* (W) sector count */
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#define ATA_IREASON 0x02 /* (R) interrupt reason */
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#define ATA_I_CMD 0x01 /* cmd (1) | data (0) */
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#define ATA_I_IN 0x02 /* read (1) | write (0) */
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#define ATA_I_RELEASE 0x04 /* released bus (1) */
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#define ATA_I_TAGMASK 0xf8 /* tag mask */
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#define ATA_SECTOR 0x03 /* sector # */
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#define ATA_CYL_LSB 0x04 /* cylinder# LSB */
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#define ATA_CYL_MSB 0x05 /* cylinder# MSB */
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#define ATA_DRIVE 0x06 /* Sector/Drive/Head register */
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#define ATA_D_LBA 0x40 /* use LBA adressing */
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#define ATA_D_IBM 0xa0 /* 512 byte sectors, ECC */
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#define ATA_CMD 0x07 /* command register */
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#define ATA_C_ATA_IDENTIFY 0xec /* get ATA params */
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#define ATA_C_ATAPI_IDENTIFY 0xa1 /* get ATAPI params*/
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#define ATA_C_READ 0x20 /* read command */
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#define ATA_C_WRITE 0x30 /* write command */
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#define ATA_C_READ_MULTI 0xc4 /* read multi command */
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#define ATA_C_WRITE_MULTI 0xc5 /* write multi command */
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#define ATA_C_SET_MULTI 0xc6 /* set multi size command */
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#define ATA_C_READ_DMA 0xc8 /* read w/DMA command */
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#define ATA_C_WRITE_DMA 0xca /* write w/DMA command */
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#define ATA_C_PACKET_CMD 0xa0 /* packet command */
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#define ATA_C_SETFEATURES 0xef /* features command */
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#define ATA_C_FEA_SETXFER 0x03 /* set transfer mode */
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#define ATA_STATUS 0x07 /* status register */
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#define ATA_S_ERROR 0x01 /* error */
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#define ATA_S_INDEX 0x02 /* index */
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#define ATA_S_CORR 0x04 /* data corrected */
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#define ATA_S_DRQ 0x08 /* data request */
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#define ATA_S_DSC 0x10 /* drive seek completed */
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#define ATA_S_SERV 0x10 /* drive needs service */
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#define ATA_S_DWF 0x20 /* drive write fault */
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#define ATA_S_DMRD 0x20 /* DMA ready */
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#define ATA_S_DRDY 0x40 /* drive ready */
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#define ATA_S_BSY 0x80 /* busy */
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#define ATA_ALTPORT 0x206 /* alternate Status register */
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#define ATA_A_IDS 0x02 /* disable interrupts */
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#define ATA_A_RESET 0x04 /* RESET controller */
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#define ATA_A_4BIT 0x08 /* 4 head bits */
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/* misc defines */
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#define ATA_MASTER 0x00
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#define ATA_SLAVE 0x10
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#define ATA_IOSIZE 0x08
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#define ATA_OP_FINISHED 0x00
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#define ATA_OP_CONTINUES 0x01
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/* busmaster DMA related defines */
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#define ATA_BM_OFFSET1 0x08
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#define ATA_DMA_ENTRIES 256
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#define ATA_DMA_EOT 0x80000000
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#define ATA_BMCMD_PORT 0x00
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#define ATA_BMCMD_START_STOP 0x01
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#define ATA_BMCMD_WRITE_READ 0x08
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#define ATA_BMSTAT_PORT 0x02
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#define ATA_BMSTAT_MASK 0x07
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#define ATA_BMSTAT_ACTIVE 0x01
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#define ATA_BMSTAT_ERROR 0x02
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#define ATA_BMSTAT_INTERRUPT 0x04
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#define ATA_BMSTAT_DMA_MASTER 0x20
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#define ATA_BMSTAT_DMA_SLAVE 0x40
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#define ATA_BMDTP_PORT 0x04
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#define ATA_WDMA2 0x22
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#define ATA_UDMA2 0x42
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/* structure for holding DMA address data */
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struct ata_dmaentry {
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u_int32_t base;
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u_int32_t count;
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};
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/* structure describing an ATA device */
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struct ata_softc {
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int32_t unit; /* unit on this controller */
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int32_t lun; /* logical unit # */
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struct device *dev; /* device handle */
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int32_t ioaddr; /* port addr */
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int32_t altioaddr; /* alternate port addr */
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int32_t bmaddr; /* bus master DMA port */
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struct ata_dmaentry *dmatab[2]; /* DMA transfer tables */
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int32_t flags; /* controller flags */
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int32_t devices; /* what is present */
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#define ATA_ATA_MASTER 0x01
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#define ATA_ATA_SLAVE 0x02
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#define ATA_ATAPI_MASTER 0x04
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#define ATA_ATAPI_SLAVE 0x08
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u_int8_t status; /* last controller status */
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u_int8_t error; /* last controller error */
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int32_t active; /* active processing request */
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#define ATA_IDLE 0x0
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#define ATA_IMMEDIATE 0x0
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#define ATA_WAIT_INTR 0x1
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#define ATA_IGNORE_INTR 0x2
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#define ATA_ACTIVE_ATA 0x3
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#define ATA_ACTIVE_ATAPI 0x4
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TAILQ_HEAD(, ad_request) ata_queue; /* head of ATA queue */
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TAILQ_HEAD(, atapi_request) atapi_queue; /* head of ATAPI queue */
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};
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#define MAXATA 8
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extern struct ata_softc *atadevices[];
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/* public prototypes */
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void ata_start(struct ata_softc *);
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int32_t ata_wait(struct ata_softc *, int32_t, u_int8_t);
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int32_t ata_command(struct ata_softc *, int32_t, u_int32_t, u_int32_t, u_int32_t, u_int32_t, u_int32_t, u_int32_t, int32_t);
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int32_t ata_dmainit(struct ata_softc *, int32_t, int32_t, int32_t, int32_t);
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int32_t ata_dmasetup(struct ata_softc *, int32_t, int8_t *, int32_t, int32_t);
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void ata_dmastart(struct ata_softc *, int32_t);
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int32_t ata_dmastatus(struct ata_softc *, int32_t);
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int32_t ata_dmadone(struct ata_softc *, int32_t);
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void bswap(int8_t *, int32_t);
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void btrim(int8_t *, int32_t);
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void bpack(int8_t *, int8_t *, int32_t);
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